Logitech G610 Orion Cherry MX Brown - LED sound and keys stuck

In this video I'm showing Logitech G610 keyboard and problems I had with it. Since then I returned keyboard and received money back from retailer. Sound problem was very annoying if you have quiet computer or you want quiet PC setup. Also next day when using keyboard I noticed that some key are stuck when pressed in some ways, especially left shift and Ctrl buttons - ones I use the most.